[PATCH] usb gadget: ethernet/rndis updates
Updates to the Ethernet/RNDIS gadget driver (mostly for RNDIS):
- Fix brown-paper bag goof with RNDIS packet TX ... the wrong length
field got set, so Windows would ignore data packets it received.
- More consistent handling of CDC output filters (but not yet hooking
things up so RNDIS uses the mechanism).
- Zerocopy RX for RNDIS packets too (saving CPU cycles).
- Use the pre-allocated interrupt/status request and buffer, rather
than allocating and freeing one of each every few seconds (which
could fail).
- Some more "sparse" tweaks, making both dual-speed and single-speed
configurations happier.
- RNDIS speeds are reported in units of 100bps, not bps.
Plus two minor cleanups (whitespace, messaging).
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/gadget/ether.c b/drivers/usb/gadget/ether.c
index cff9fb0..3993156 100644
--- a/drivers/usb/gadget/ether.c
+++ b/drivers/usb/gadget/ether.c
@@ -100,6 +100,8 @@
/* CDC and RNDIS support the same host-chosen outgoing packet filters. */
#define DEFAULT_FILTER (USB_CDC_PACKET_TYPE_BROADCAST \
+ |USB_CDC_PACKET_TYPE_ALL_MULTICAST \
+ |USB_CDC_PACKET_TYPE_PROMISCUOUS \
|USB_CDC_PACKET_TYPE_DIRECTED)
@@ -322,12 +324,18 @@
/* also defer IRQs on highspeed TX */
#define TX_DELAY qmult
-#define BITRATE(g) (((g)->speed == USB_SPEED_HIGH) ? HS_BPS : FS_BPS)
+static inline int BITRATE(struct usb_gadget *g)
+{
+ return (g->speed == USB_SPEED_HIGH) ? HS_BPS : FS_BPS;
+}
#else /* full speed (low speed doesn't do bulk) */
#define qlen(gadget) DEFAULT_QLEN
-#define BITRATE(g) FS_BPS
+static inline int BITRATE(struct usb_gadget *g)
+{
+ return FS_BPS;
+}
#endif
@@ -1167,7 +1175,7 @@
eth_reset_config (dev);
/* default: pass all packets, no multicast filtering */
- dev->cdc_filter = 0x000f;
+ dev->cdc_filter = DEFAULT_FILTER;
switch (number) {
case DEV_CONFIG_VALUE:
@@ -1343,9 +1351,9 @@
struct eth_dev *dev = get_gadget_data (gadget);
struct usb_request *req = dev->req;
int value = -EOPNOTSUPP;
- u16 wIndex = ctrl->wIndex;
- u16 wValue = ctrl->wValue;
- u16 wLength = ctrl->wLength;
+ u16 wIndex = (__force u16) ctrl->wIndex;
+ u16 wValue = (__force u16) ctrl->wValue;
+ u16 wLength = (__force u16) ctrl->wLength;
/* descriptors just go into the pre-allocated ep0 buffer,
* while config change events may enable network traffic.
@@ -1693,7 +1701,7 @@
/* Some platforms perform better when IP packets are aligned,
* but on at least one, checksumming fails otherwise. Note:
- * this doesn't account for variable-sized RNDIS headers.
+ * RNDIS headers involve variable numbers of LE32 values.
*/
skb_reserve(skb, NET_IP_ALIGN);
@@ -1730,9 +1738,11 @@
#ifdef CONFIG_USB_ETH_RNDIS
/* we know MaxPacketsPerTransfer == 1 here */
if (dev->rndis)
- rndis_rm_hdr (req->buf, &(skb->len));
+ status = rndis_rm_hdr (skb);
#endif
- if (ETH_HLEN > skb->len || skb->len > ETH_FRAME_LEN) {
+ if (status < 0
+ || ETH_HLEN > skb->len
+ || skb->len > ETH_FRAME_LEN) {
dev->stats.rx_errors++;
dev->stats.rx_length_errors++;
DEBUG (dev, "rx length %d\n", skb->len);
@@ -2047,38 +2057,20 @@
DEBUG ((struct eth_dev *) ep->driver_data,
"rndis control ack complete --> %d, %d/%d\n",
req->status, req->actual, req->length);
-
- usb_ep_free_buffer(ep, req->buf, req->dma, 8);
- usb_ep_free_request(ep, req);
}
static int rndis_control_ack (struct net_device *net)
{
struct eth_dev *dev = netdev_priv(net);
u32 length;
- struct usb_request *resp;
+ struct usb_request *resp = dev->stat_req;
/* in case RNDIS calls this after disconnect */
- if (!dev->status_ep) {
+ if (!dev->status) {
DEBUG (dev, "status ENODEV\n");
return -ENODEV;
}
- /* Allocate memory for notification ie. ACK */
- resp = usb_ep_alloc_request (dev->status_ep, GFP_ATOMIC);
- if (!resp) {
- DEBUG (dev, "status ENOMEM\n");
- return -ENOMEM;
- }
-
- resp->buf = usb_ep_alloc_buffer (dev->status_ep, 8,
- &resp->dma, GFP_ATOMIC);
- if (!resp->buf) {
- DEBUG (dev, "status buf ENOMEM\n");
- usb_ep_free_request (dev->status_ep, resp);
- return -ENOMEM;
- }
-
/* Send RNDIS RESPONSE_AVAILABLE notification;
* USB_CDC_NOTIFY_RESPONSE_AVAILABLE should work too
*/
@@ -2113,7 +2105,7 @@
if (dev->rndis) {
rndis_set_param_medium (dev->rndis_config,
NDIS_MEDIUM_802_3,
- BITRATE(dev->gadget));
+ BITRATE(dev->gadget)/100);
rndis_send_media_state (dev, 1);
}
#endif
@@ -2307,8 +2299,8 @@
device_desc.bcdDevice = __constant_cpu_to_le16 (0x0210);
} else if (gadget_is_pxa27x(gadget)) {
device_desc.bcdDevice = __constant_cpu_to_le16 (0x0211);
- } else if (gadget_is_s3c2410(gadget)) {
- device_desc.bcdDevice = __constant_cpu_to_le16 (0x0212);
+ } else if (gadget_is_s3c2410(gadget)) {
+ device_desc.bcdDevice = __constant_cpu_to_le16 (0x0212);
} else if (gadget_is_at91(gadget)) {
device_desc.bcdDevice = __constant_cpu_to_le16 (0x0213);
} else {
diff --git a/drivers/usb/gadget/rndis.c b/drivers/usb/gadget/rndis.c
index 6c51978..7457268 100644
--- a/drivers/usb/gadget/rndis.c
+++ b/drivers/usb/gadget/rndis.c
@@ -37,6 +37,7 @@
#include <asm/io.h>
#include <asm/byteorder.h>
#include <asm/system.h>
+#include <asm/unaligned.h>
#undef RNDIS_PM
@@ -165,7 +166,7 @@
/* mandatory */
case OID_GEN_LINK_SPEED:
- DEBUG("%s: OID_GEN_LINK_SPEED\n", __FUNCTION__);
+// DEBUG("%s: OID_GEN_LINK_SPEED\n", __FUNCTION__);
length = 4;
if (rndis_per_dev_params [configNr].media_state
== NDIS_MEDIA_STATE_DISCONNECTED)
@@ -729,7 +730,7 @@
retval = 0;
/* FIXME use these NDIS_PACKET_TYPE_* bitflags to
- * filter packets in hard_start_xmit()
+ * set the cdc_filter; it's not RNDIS-specific
* NDIS_PACKET_TYPE_x == USB_CDC_PACKET_TYPE_x for x in:
* PROMISCUOUS, DIRECTED,
* MULTICAST, ALL_MULTICAST, BROADCAST
@@ -1194,10 +1195,10 @@
return;
header = (void *) skb_push (skb, sizeof *header);
memset (header, 0, sizeof *header);
- header->MessageType = __constant_cpu_to_le32 (1);
+ header->MessageType = __constant_cpu_to_le32(REMOTE_NDIS_PACKET_MSG);
header->MessageLength = cpu_to_le32(skb->len);
header->DataOffset = __constant_cpu_to_le32 (36);
- header->OOBDataOffset = cpu_to_le32(skb->len - 44);
+ header->DataLength = cpu_to_le32(skb->len - sizeof *header);
}
void rndis_free_response (int configNr, u8 *buf)
@@ -1253,26 +1254,23 @@
return r;
}
-int rndis_rm_hdr (u8 *buf, u32 *length)
+int rndis_rm_hdr(struct sk_buff *skb)
{
- u32 i, messageLen, dataOffset;
- __le32 *tmp;
-
- tmp = (__le32 *) buf;
+ /* tmp points to a struct rndis_packet_msg_type */
+ __le32 *tmp = (void *) skb->data;
- if (!buf || !length) return -1;
- if (le32_to_cpup(tmp++) != 1) return -1;
-
- messageLen = le32_to_cpup(tmp++);
- dataOffset = le32_to_cpup(tmp++) + 8;
+ /* MessageType, MessageLength */
+ if (__constant_cpu_to_le32(REMOTE_NDIS_PACKET_MSG)
+ != get_unaligned(tmp++))
+ return -EINVAL;
+ tmp++;
- if (messageLen < dataOffset || messageLen > *length) return -1;
-
- for (i = dataOffset; i < messageLen; i++)
- buf [i - dataOffset] = buf [i];
-
- *length = messageLen - dataOffset;
-
+ /* DataOffset, DataLength */
+ if (!skb_pull(skb, le32_to_cpu(get_unaligned(tmp++))
+ + 8 /* offset of DataOffset */))
+ return -EOVERFLOW;
+ skb_trim(skb, le32_to_cpu(get_unaligned(tmp++)));
+
return 0;
}
diff --git a/drivers/usb/gadget/rndis.h b/drivers/usb/gadget/rndis.h
index 8225018..2b5b55d 100644
--- a/drivers/usb/gadget/rndis.h
+++ b/drivers/usb/gadget/rndis.h
@@ -38,6 +38,7 @@
*/
/* Message Set for Connectionless (802.3) Devices */
+#define REMOTE_NDIS_PACKET_MSG 0x00000001U
#define REMOTE_NDIS_INITIALIZE_MSG 0x00000002U /* Initialize device */
#define REMOTE_NDIS_HALT_MSG 0x00000003U
#define REMOTE_NDIS_QUERY_MSG 0x00000004U
@@ -333,7 +334,7 @@
const char *vendorDescr);
int rndis_set_param_medium (u8 configNr, u32 medium, u32 speed);
void rndis_add_hdr (struct sk_buff *skb);
-int rndis_rm_hdr (u8 *buf, u32 *length);
+int rndis_rm_hdr (struct sk_buff *skb);
u8 *rndis_get_next_response (int configNr, u32 *length);
void rndis_free_response (int configNr, u8 *buf);